DescriptionBasic Magical Thermometer Stickers, Work Like Pros!Sleek, accurate, you can read temps within a few minutes of their applyingThey are attached on the outside of the jars/bottles/tanks, don't interfere with cleaningHow to Use This Thermometer Sticker?The outside of tank/jar/bottle/aquarium must be dryRemove white protective film from the thermometer stripStick this strip onto the outside of tank/jar/bottle/aquariumBe sure this sticker is sticked below the water level, the lower the betterThe strip will display corresponding color and tell the exact temperature (range) in 2 to 5 minutesHow to Read The Temps?There will be 3 colors to indicate the current temp (range):The green indicates the current temperatureThe brown indicates the current temperature is lower than this valueThe blue indicates the current temperature is higher than this valueIf three colors are displayed simultaneously, the green value is current temperatureIf brown and blue are displayed, but green is not displayed, the average value of brown value and blue value is the current temperatureTips for Reading Temps More SuccessfullyIf they don't read well in the dark or dim spaces, you need to read them accurately with pretty bright light (shine a flash light on the sticker)Package5* Aquarium Thermometer Strip